Police say a 4-year-old boy got behind the wheel of a minivan, and then ran over a woman and her 3-week-old child, killing the newborn.
The mother was hospitalized after the accident Thursday night at a mobile home park in Burleson, 10 miles south of Fort Worth, said police Cmdr. Chris Havens.
Havens did not identify those involved in the accident or provide details of the mother's condition.
The 4-year-old had a 5-year-old passenger, Havens said.
The younger boy "got the van operating, and running — actually got it in drive," KDFW of Dallas quoted Havens as saying. "At which time the mother had heard it start up, came outside with her infant."
Police did not explain the relationship between the woman and the children in the vehicle.
Havens said the case is under investigation but that it appears to have been an accident. The two boys will not be questioned until they receive counseling, he added.